Il modo più semplice e pratico per risolvere i problemi proporzionali ...

This is the 2nd of the 'BEST TOOLS' series with the idea of 'Math that works'. Here is a practical way of the use of the Rule of Three, once you start using it, you will discover how useful it can be in the WORK and the EDUCATIONAL areas.

What makes this app very useful is the ability to create your own equivalences and name the units at your own way, In this version you will have the option to save them so you can recall them any time you need them.

Another point is the easy way to create new equivalences.

To avoid confusions you can see at the top a logic sentence that describe the numerical values interactively way while your are typing them (Right way to read the Rule of Three).

...(This is the beauty of Math when it is applied to daily live problems.)